PDME — Exception declaration inconsistent

The exception declarations for the operations get_viewable_info and get_updatable_info of interface PdmFramework::Attributable are inconsistent. get_updatable_info can raise the PDM_EXCEPTIONS and PdmFoundation::InvalidProperties, while get_viewable_info can not raise any exceptions at all. Since both operations only provide one out parameter, the exception PdmFoundation::InvalidProperties does not make sense for either of them. Suggestion is to let both of them raise only the PDM_EXCEPTIONS.